beta ray

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Related to beta ray: alpha ray

be·ta par·ti·cle

an electron, either positively (positron, β+) or negatively (negatron, β-) charged, emitted during beta decay of a radionuclide.
See also: cathode rays.
Synonym(s): beta ray

beta particle

An ionising electron or positron which is emitted from decaying radioactive nuclei during beta decay or beta emission. Beta particles are equal in mass and charge to electrons.


Abbreviation for beta.


(β) (bā'tă)
1. Second letter of the Greek alphabet.
2. chemistry Denotes the second in a series, the second carbon from a functional (e.g., carboxylic) group, or the direction of a chemical bond toward the viewer. For terms with the prefix β, see the specific term.

beta ray

A ray composed of negatively charged electrons expelled from atoms of disintegrating radioactive elements.
Synonym: beta particle
See also: ray
References in periodicals archive ?
Beta rays come from an e-beam generator, which provides the same features as gamma radiation but with reduced penetrating power.
By now it was understood that beta rays were streams of speeding electrons (beta particles), while gamma rays were electromagnetic radiation of still shorter wavelength and higher frequency than X rays.
The ocean contains a certain amount of radioactive potassium, which emits beta rays that produce Cherenkov light of their own.
The beta rays emitted from the CU-67 can isolate and attack tumors on a very deep level.
The liquid was tainted with 80 million Bq per liter of radioactive material emitting beta rays.
After decay the nucleus does not always go to its ground state or least-energy state, and this can have an effect on the energy spectrum of the beta rays that is similar to the effect a small neutrino mass would have.
85 million becquerels of radioactive substances emitting beta rays, such as strontium-90, have been discharged.